NOTE: As their name suggests hints are not exactly Brain Age Express: Arts & Letters cheats, and are usually just simple (but very useful) tips on how you can unlock secret level, features, find hidden areas and such. Hopefully these will make playing Brain Age Express: Arts & Letters even more entertaining.

Destroy all enemies (Word Attack Space Mode)
During the Space mode of the Word Attack training game, if you press AYXB exactly in that order, all of the enemies on screen will be destroyed. NOTE: You only get to use this one time every time you train with this.

Destroy all enemies (Word Attack - Space mode): AYXB

Unlockable Games and Modes
Once a day, if you do a Training game or a Brain Age Check, you will get a stamp. Should you collect enough of these stamps, you will unlock new games, modes, and options. NOTE: To do Virus Buster after it's unlocked, you must have a stamp for that day.

Unlock Challenge Mode
Any time after the initial Brain Age Check, if you obtain a Brain Age score of 20, you will unlock the Challenge Mode. NOTE: This is MUCH harder than what you normally do in Training.